Recently, several major pulsar timing array (PTA) collaborations have assembled strong
evidence for the existence of a gravitational-wave background at frequencies around the …

The bubbles that nucleated during slow-roll inflation can be supercritical, ie, their radii are
larger than the Hubble horizon of de Sitter spacetime inside the bubble (an inflating baby …

We show that, when connected with monopoles, the flat D-flat direction breaking the local U
(1) BL symmetry as an extension of the minimal supersymmetric standard model can be …

The data recently released by the North American Nanohertz Observatory for Gravitational
Waves provides compelling evidence supporting the existence of a stochastic signal that …

Pulsar timing array (PTA) observations hinted towards the existence of a stochastic
gravitational wave background (SGWB) in the nHz frequency band. Still, the nature of the …

We discuss E 6 based extensions of the Standard Model (SM) containing two varieties of
superheavy metastable cosmic strings (CSs) that respectively have neutral and electrically …

We study the possibility of testing a dark matter (DM) scenario embedded in a global lepton
number symmetry U (1) L via gravitational waves (GWs) and cosmic microwave background …

A bstract Recently, evidence of stochastic gravitational wave background (SGWB) signals
observed by pulsar timing array (PTA) collaborations, has prompted investigations into their …

We explore the phenomenological consequences of breaking discrete global symmetries in
quantum gravity (QG). We extend a previous scenario where discrete global symmetries are …

Neutrino masses and quantum gravity are strong reasons to extend the standard model of
particle physics. A large extra dimension can be motivated by quantum gravity and can …